Cricotopus bicinctus

Author: (Meigen, 1818)

Diagnosis (in part after Hirvenoja, 1973a - in italics)
Exuviae 3.2-5.1mm long (m=4.1mm, n=25) (089-1.jpg).
Cephalothorax: Cephalic tubercles absent; frontal setae on frontal apotome, 85-170µm long (n=9), just anterior to mid-line between the antennal bases. Thoracic horn 105-180µm long (m=152µm, n=20), not obliquely truncate apically (089b.jpg); ThR 3.7-7.8 (m=5.4, n=20). Dorsocentral setae of similar lengths, the second thinner than the other three. Thorax granulate, especially anteriorly.
Abdomen: Length hook row II 0.42-0.55 of width tergite II (n=9); hooks 51-103 (n=7). Minute points on segments I-II and VII-IX, tergites III-VI with strong shagreen, anterior and posterior point patches on more posterior segments fused, anterior point patches somewhat kidney-shaped. Median point band of tergite III transverse and narrow (occasionally absent), situated in the third quarter of the segment (089c.jpg). Median transverse point band of tergites IV and V deeper, extending into the second quarter of the tergite. Point patches absent on tergites VII and VIII. Pedes spurii B present on segments II and III, usually conspicuous. Dorsal setae I-VIII: 4,4-5,4-5,5,5,5,5,2; Lateral setae I-VIII; 1,3,3,3,3,3,3,4; Ventral setae I-VIII: 0,3-4,3-4,4,4,4,4,0; lateral seta 4 not stronger than the other lateral setae on VIII, also ventral setae only indicated.
Anal segment: Anal lobe ratio 1.4-2.0 (n=8). Anal lobes without fringe. Anal macrosetae more or less equally strong; length 0.42-0.60x length of the anal lobe (m=0.53, n=15).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 929: Orthocladiinae 340 Cricotopus of the Text Key.

Holarctic species: widespread in Europe, circum-Mediterranean.
(For more information see module IdentifyIt – file: Orthocladiinae).

Ecological notes
Streams and rivers, occasionally ponds.